Kdaddy,
To Improve on my "Brother from a different Mother" (Breeze-Pete) Great Idea...
Use a flat shoe lace to work around twice and pull down tight covering the bottom slit. This will help you keep grease Going Upward...
The necks on these bikes are NOT filled from the factory and I NEVER seen OR Heard of them getting filled at a HD Shop, and that is my HO (.) not a period from the Liar Liar Pants On Fire Guy.....:55::55::55:
It will take a full and about another 1/2 tube IF never filled before.(normal)
Being you are using Green Grease, IT won't blend in with the HD (Little amount they used when Built and put together)
SO,,,,,Plan on a big ring of your NEW grease (easily seen as it is probably Green/Blue) to come out TOP Also, so you know it is totally lubed up on top.
Messy YES but YOU will FEEL a BIG difference in the steering and the ride after filled.
Next Time it will be Easier.....:s
I would also suggest to Pump a little more into it in about a 1000 miles and you will be good to go. You may Not need the shoe lace next time. Use Plenty of Klean-X as it will do a Better job of grabbing the GLOBS of e-jected grease than a rag...
Let us know how it works for you...
Mine greased easily and came out the top at the same time....LUCKY... I leave a 1/4 inch ring around the top and the bottom and it stays there on my RED synthetic Thick grease
signed....BUBBIE